Robert Osfield wrote:
Are you dynamically updating the text each frame? If so set the
DataVariance to DYNAMIC.
Hmmm, if setting it to STATIC causes a crash like this, might that be a
design flaw?
Paul
Robert.
On Wed, Oct 8, 2008 at 6:09 PM, Chris <[EMAIL PROTECTED]> wrote:
Hi,
I'm having semi-random crash bugs when I add an osgText drawable to my
scene. The actual error is a mem access violation, and it occurs after I've
added & removed the node containing the drawable from the scene a random
number of times' (usually from 1 to 10 times)
The exception occurs in the same place in the call stack, apparently
somewhere in my open gl .dll (nvoglnt.dll). One thing that puzzles me is
that I'm using SWIG, and from the call stack the function
PySwigObject_Check(PyObject *op) ) seems to call into the osgUtil .dll,
which in about 10 stack layers ends up calling nvoglnt.dll. I don't know why
'PySwigObject_Check' would be caling the osg .dll, (see func copied below),
but maybe some sort of wierd thread confusion ?
SWIGRUNTIMEINLINE int
PySwigObject_Check(PyObject *op) {
return ((op)->ob_type == PySwigObject_type())
|| (strcmp((op)->ob_type->tp_name,"PySwigObject") == 0);
}
The crash does NOT occur if I repeatedly create/delete the osgText drawable
but don't add it to my scene. It does not crash during the render but seems
to corrupt something that fails elsewhere (apparently in
'PySwigObject_Check' )
While I can't be certain it's not my code, I have been running the same
render code (which uses osg) now for a few years without problems. Note
that I dont explictly create extra threads in my code, beyond what osg might
be doing.
I thought this looked like some thread/mutex problem, or pehaps a VC++ STL
problem (anyone had these issues with osg Text before?) I created a new
version of osgText that hacks out the STL-based 'String' class used to
'setText', but no dice.
I was running on WinXP, using compiler: Visual Studio .net 2002. I just
installed Osg 2.7.1, and Visual Studio Express 9.0; but the crash still
occurs.
TIA,
Chris
--
www.sketch3.com
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